Sprites vs background alignment is sometimes off when scrolling. This is especially noticeable when it's crowded on screen with the game having slowdowns.

Steps To Reproduce

- just play
- easiest to reproduce bug with: Take the Japanese plane and power it up to the max, shoot a lot to make it taxing on the game and have it slow down. More chance for the bug to occur then, look at ground object sprites.

I do wonder if these games ever had proper sprite / bg sync on real hw.

If you look at the PSX version (Sonic Wings Special) it has horrific desync (at least in MAME/MESS), and afaik the PSX doesn't even have a concept of different layers...

Some evidence as to how bad the sync is (or if it remains perfect all the time) on real hardware would be interesting.

No.08014

hap

Developer

Jan 5, 2012, 14:24

agreed, I'll set the bug to [possible]

btw, you have the ability/right to change bug status, for example setting this one to 'confirmed' if you know the bugreport is valid. It doesn't necessarily have to be an admin (like Tafoid) that does it.

No.13506

Kale

Developer

Dec 26, 2016, 00:22

VBlank is controlled by that funny CRTC device, also reinstating this being something to be done anyway.

No.16108

MetalGod

Senior Tester

16 days ago

Here's a pcb video:

No.16112

Haze

Senior Tester

16 days ago

edited on: 16 days ago

This is the type of thing where you'd need a 60fps video to really notice it, 30fps videos on YouTube are going to mask the issue even if it does occur on hardware.